/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraGraph.h
Gets the current compile data hash associated with the output node traversal specified by InUsage and InUsageId. If the usage is not found, an invalid hash is returned.
[FNiagaraCompileHash](API\Plugins\NiagaraCore\FNiagaraCompileHash) GetCompileDataHash ( [ENiagaraScriptUsage](API\Plugins\Niagara\ENiagaraScriptUsage) InUsage, const [FGuid](API\Runtime\Core\Misc\FGuid) & InUsageId ) const